Watch Ariana Grande Kiss Her 'Victorious' Costar Liz Gillies

Ariana Grande gets pretty giddy in one of her latest Instagram videos.

The "Problem" singer was hanging out with her former Victorious costar, Liz Gillies, when the two decided to share a silly smooch. The kiss led Grande to immediately squeal with laughter.

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"My favorite video of all time @lizgillz," the 22-year-old pop star Instagrammed. "P.S. This was totally posted by accident."

On Tuesday, Grande took to Twitter to further explain how she accidentally posted the video.

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"I WAS EDITING IT IN INSTA TO SEND TO HER AND IT POSTED ACCIDENTALLY BUT ITS GREAT SO WHATEVER," she tweeted. "HAHHAHAHA @LIZGILLIES OOPS."

While Grande and Gillies had a mini Victorious reunion of their own, the former show's star, Victoria Justice, wasn't so sure about reuniting with her former Disney costar.

"I think we're kind of both on our own separate paths right now," Justice responded when asked by ET if she'd ever work with Grande again. "I've been more focused on acting and she's doing her singing thing and doing awesome."

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Would you like to see a full-on Victorious reunion?